Abstract: The present invention provides an in-line fluid emitter facilitating a controlled flow of fluid from a pipe in which the emitter is disposed. The emitter includes the following features: (1) a hollow generally cylindrical emitter body, with a plurality of openings defined in the emitter body to facilitate the flow of fluid therethrough; (2) a pressure compensating, resilient valve mounted in the emitter body; (3) a first passage defined in the emitter body directing the fluid from the openings to the valve; (4) an exit flow region defined in the emitter body, the exit flow region being in fluid connection with the output of the valve to receive fluid that has passed through the valve; and (5) a pair of annular sealing rings, one of which is disposed to a distal side of the openings, and the other of which is disposed to a distal side of the exit flow region, to seal the area between the pipe and the emitter.

Abstract: A pulsator, adapted for use in irrigation and other systems requiring the uniform discharge of water or other liquids in intermittent pulses and at regular frequencies, comprises a casing having an expansible elastomeric tube disposed therein. The tube is adapted to be exposed to pressurized liquid for movement between contracted and expanded conditions of operation for controlling the intermittent opening of a valve, formed in part by the tube. A flow control, located at the inlet to the pulsator, functions to modulate the pressure of the incoming liquid to control the flow rate of the liquid communicated to an expansible chamber defined in part by the tube. When the pressure in the chamber exceeds a predetermined level, the valve will open to intermittently discharge pulses of liquid to a distributor, such as an irrigation sprayer. The pulsator is preferably structured to insure continuous communication of liquid from the inlet to the pulsator to the chamber.